Bausch & Lomb Petrographical Microscope

Description:

Bausch & Lomb Petrographical Microscope, No. 48090, with lacquered-brass tube, coarse focusing, micrometer fine focusing on pillar, circular stage with vernier, sub-stage with iris diaphragm, plano/concave reflector and black-enameled U-foot engraved Pacific Metro Materials Co., San Francisco, ht. 13 in., in mahogany case containing three objectives, eyepieces and other accessories.
Estimate $1,000-1,500

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